| 摘要 |
The device is designed to enable the user to perform both abdominal strengthening and back muscle strengthening exercises on the top surface of a conventional bed. A conventional bed is defined as one with a semi-rigid mattress and a rigid frame. The device attaches and detaches to the said bed easily and provides the means to strengthen both the flexor and extensor muscles of the trunk with the added advantages of convenience and low cost. The device is a departure from the previous art as detailed in reference number U.S. Pat. No. 6,890,289 Spinosa, May 10, 2005, in that it provides increased stability for both the bed and the user in the performance of said exercises.
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